76 I do not agree with the submission for Mr Vukancic that it is a corollary that his economic loss should be calculated by having regard to increases in wages after the notional trial date of the employers' liability claim, based on known increases in the wages of comparable employees subsequent to that date. There are at least two reasons for this. The first is that the applicable discount rate is struck to take into account the impact of inflation and interest. While it is necessarily imperfect in achieving that balance, it is a conventional way of taking into account prospective routine increases in wages. The second is that the exercise involves comparing what Mr Vukancic would have received but for the relevant act or omission, with what he has in fact received. What he would have received is the chance of an award of common law damages, assessed according to what was known and provable at the notional trial date of the employers' liability claim. That could not be influenced by changes in circumstances after that date (1 March 2001). What he has in fact received, however, can be informed by circumstances known up to the hearing of the professional negligence claim against Velcics (1 September 2005).
77 Mr Vukancic has a dependent wife and four children, three of whom are still dependent. In 3 years this will reduce to two dependent children, after 13 years this will reduce to one dependant child and after 15 years to none. Between March 2001 and September 2005 (4.5 years), Mr Vukancic received weekly payments totalling $103,965. The mid-point (2.25 years) was June 2004, and the value as at 1 March 2001 of a sum of $103,965 deferred for 2.25 years is $93,048.
78 As at 1 September 2005, Mr Vukancic was in receipt of $489.75 net per week, which he would have continued to receive until 29 October 2010 when Marko attains 18, a period of about 5.2 years; the lump sum required to produce $489.75 net per week for 5.2 years is $117,540, and its value at 1 March 2001 (deferred for 4.5 years to 1 September 2005) is $94,032. From October 2010 he would be entitled to the statutory rate for a worker with a dependant spouse and two dependant children which, as at September 2005, was $455 net per week (based on $563 gross per week) until February 2020 when Marin attains 18, a period of 9.25 years; the lump sum required to produce $455 net per week for 9.25 years is $176,540, and its value at 1 March 2001 (deferred for 9.7 years to October 2010) is $110,337. From February 2020 until Patrick attains 18 years of age in May 2022, a period of 2.25 years, he would be entitled to the statutory rate for a worker with a dependant spouse and one dependant child, which as at September 2005 was $400 net per week, (based on $485.10 gross per week); the lump sum required to produce $400 net per week for 2.25 years is $44,400, and its value at 1 March 2001 (deferred for 19 years to February 2020) is $17,582. After May 2022 until retirement at age 65 in August 2028, a period of 6.25 years, he would be entitled to the statutory rate for a worker with a dependant spouse which as at September 2005 was $364.50 net per week (based on $422.20 gross per week); the lump sum required to produce $364.50 net per week for 6.25 years is $102,060, and its value at 1 March 2001 (deferred for 21.25 years to May 2022) is $36,027. Thus the value (as at 1 March 2001) of Mr Vukancic's future (as at 1 September 2005) workers compensation rights, totalled $257,978.
79 It is necessary to discount the future workers compensation benefits for vicissitudes, including that they may be reduced or terminated in the future, and that they may be commuted for a lump sum. Although they are to be valued on a basis similar to future economic loss (as the present value of a future income stream) and not according to the value for which they might be commuted to a lump sum, the circumstance that if commuted only a sum significantly less than their discounted present value would likely be obtained is a relevant consideration. In Tipper v Williams, Clarke JA thought that in valuing future workers compensation rights there was no constant deduction and different rates would be appropriate for different cases and circumstances. In that case, his Honour applied an allowance of 30%, saying:
Further, it has often been said that there is a real difference between the benefit of a lump sum to a person in the position of the respondent and the benefit of periodical payments (see, for instance, Scott & Ors v Echegaray [1991] Aust Tort Reports 69129 at 69137-8) and the fact that on a redemption a worker receives a much lesser sum than would be arrived at by the conventional discounting procedures followed in assessing common law damages is, to an extent, a recognition of this.
In all these circumstances it seems to me that the appropriate course is, in the light of his Honour's findings and the manner in which he approached impairment of future earning capacity, to proceed upon the basis that the respondent was entitled to receive the appropriate weekly sum payable as at 31 May 1987 for 29 years and then to apply a discount for vicissitudes of the same percentage applied by Wood J. It will be recalled that Wood J took the view that while the respondent was partially incapacitated his chances of returning to the workforce were theoretical rather than real and his Honour applied a high discount of 30 per cent, partly, to take account of the possibility he might earn moneys from time to time. Likewise, I believe that a discount in the same percentage should be adopted to take account of the vicissitudes which apply in respect of the workers' compensation entitlements. Although the considerations may be different where there has been an award made by the Compensation Court, it seems to me appropriate to make a significant deduction for the vicissitudes in order adequately to give recognition to the uncertainties concerning the amount of workers' compensation payments which may be received in the future and the fact that if the respondent wished to obtain a lump sum it would be very much smaller than the amount arrived at by the valuation process I propose. In addition the prospect, which his Honour took into account in fixing an allowance for vicissitudes, that the respondent may find some work in the future should not be overlooked and if he did secure part-time, or even full-time, employment that could have a significant impact on the level of workers' compensation payments to which he could look forward.
80 In the present case, although no award for weekly payments has been made by the Compensation Court - those payments having been made voluntarily - there are awards in respect of permanent loss compensation, which establish eligibility for compensation. However, there have been some negotiations for a commutation, which demonstrate that if he accepted a commutation Mr Vukancic would receive a sum much less than the true value of his entitlement to periodical payments. There is also evidence, in the form of periodical medical certificates, that he has some capacity for light duties; on the other hand there is no indication that the workers compensation insurer has taken any step towards reviewing his entitlements to receive weekly payments indefinitely. In my view, his entitlement is not so precarious as was the case in Tipper v Williams, and I will allow a discount of 22.5% for vicissitudes in this respect.
81 Such a discount reduces the value as at 1 March 2001 of Mr Vukancic's future weekly compensation benefits from $257,978 to $199,932. As at the date of the hypothetical trial against Velcics he would have already received weekly payments up to 1 September 2005, no allowance for vicissitudes is warranted in respect of the sum of $93,048. Accordingly, as at 1 March 2001, Mr Vukancic retained entitlements to weekly compensation payments worth $292,980.
82 As well as weekly payments, Mr Vukancic received, for permanent loss compensation, $37,500 paid to him on 25 March 1998 pursuant to the settlement on 11 March 1998, and a further $30,000, pursuant to the settlement on 28 January 2003. In addition, he received the proceeds of a "Top Up" insurance benefit from Cover Force Insurance, of $37,467.15 on 7 December 1998, and a further $20,838.75 on 5 May 2003. Perfection would require allowing interest on the earlier payments until February 2001, and discounting the later payments for deferral after that date, but the amounts are distributed in a manner on each side of the valuation date that sufficient justice is attained by neither allowing interest on the earlier payments, nor discounting the later ones, before bringing them to account.
83 The "top up" insurance payments were pursuant to a policy which provided, inter alia, "workers compensation top up cover" for employees of the Policyowner, including in the case of permanent injury an amount equal to 100% of the Lump Sum Benefits under s 66 and s 67 of the Workers Compensation Act, subject to certain exceptions. Clause 20(a) of the Policy provided that no benefit was payable for workers compensation top up cover where the employee was not entitled to compensation under the Workers Compensation Act, except where a loss of entitlement was solely a consequence of an unsuccessful common law action in accordance with Workers Compensation Act, s 151A. Accordingly, had Mr Vukancic brought a successful common law claim, he would not have been entitled to the "top up" benefits he in fact received. But had he brought an unsuccessful common law claim, he would still have been entitled to those benefits, though not to lump sum compensation under ss 66 or 67.